Greenland Ice Study (IMAGE) University of Colorado at Boulder Caption CU-Boulder postdoctoral researcher Vasilii Petrenko, foreground, cleans a sample ice block from Greenland while Scripps Institution of Oceanography Professor Jeff Severinghaus loads another ice block into a vacuum melting tank. Credit Photo courtesy Hinrich Schaefer Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.